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contains |
contains |
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SUBROUTINE newmicro (paprs, play, t, qlwp, clc, cltau, clemi, cldh, cldl, & |
SUBROUTINE newmicro (paprs, play, t, cldliq, clc, cldtau, clemi, cldh, cldl, & |
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cldm, cldt, ctlwp, flwp, fiwp, flwc, fiwc) |
cldm, cldt, ctlwp, flwp, fiwp, flwc, fiwc) |
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! From LMDZ4/libf/phylmd/newmicro.F, version 1.2 2004/06/03 09:22:43 |
! From LMDZ4/libf/phylmd/newmicro.F, version 1.2 2004/06/03 09:22:43 |
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! Authors: Z. X. Li (LMD/CNRS), Johannes Quaas |
! Authors: Z. X. Li (LMD/CNRS), Johannes Quaas |
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! Date: 1993/09/10 |
! Date: 1993/09/10 |
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! Objet: calcul de l'épaisseur optique et de l'émissivité des nuages. |
! Objet: calcul de l'\'epaisseur optique et de l'\'emissivit\'e des nuages. |
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USE conf_phys_m, ONLY: rad_chau1, rad_chau2 |
USE conf_phys_m, ONLY: rad_chau1, rad_chau2 |
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USE dimphy, ONLY: klev, klon |
USE dimphy, ONLY: klev, klon |
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USE suphec_m, ONLY: rg |
USE suphec_m, ONLY: rg |
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REAL, intent(in):: paprs(:, :) ! (klon, klev+1) |
REAL, intent(in):: paprs(:, :) ! (klon, klev+1) |
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! pression pour chaque inter-couche, en Pa |
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real, intent(in):: play(:, :) ! (klon, klev) |
real, intent(in):: play(:, :) ! (klon, klev) |
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REAL, intent(in):: t(:, :) ! (klon, klev) temperature |
REAL, intent(in):: t(:, :) ! (klon, klev) temperature |
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REAL, intent(in):: qlwp(:, :) ! (klon, klev) |
REAL, intent(in):: cldliq(:, :) ! (klon, klev) |
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! eau liquide nuageuse dans l'atmosphère (kg/kg) |
! mass fraction of liquid water in atmosphere |
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REAL, intent(inout):: clc(:, :) ! (klon, klev) |
REAL, intent(inout):: clc(:, :) ! (klon, klev) |
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! couverture nuageuse pour le rayonnement (0 à 1) |
! couverture nuageuse pour le rayonnement (0 à 1) |
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REAL, intent(out):: cltau(:, :) ! (klon, klev) épaisseur optique des nuages |
REAL, intent(out):: cldtau(:, :) ! (klon, klev) |
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REAL, intent(out):: clemi(:, :) ! (klon, klev) émissivité des nuages (0 à 1) |
! \'epaisseur optique des nuages |
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REAL, intent(out):: clemi(:, :) ! (klon, klev) |
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! \'emissivit\'e des nuages (0 à 1) |
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REAL, intent(out):: cldh(:), cldl(:), cldm(:), cldt(:) ! (klon) |
REAL, intent(out):: cldh(:), cldl(:), cldm(:), cldt(:) ! (klon) |
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REAL, intent(out):: ctlwp(:) ! (klon) |
REAL, intent(out):: ctlwp(:) ! (klon) |
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REAL, PARAMETER:: cetahb = 0.45, cetamb = 0.8 |
REAL, PARAMETER:: cetahb = 0.45, cetamb = 0.8 |
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INTEGER i, k |
INTEGER i, k |
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REAL zflwp(klon), fice |
REAL zflwp ! liquid water path, in micrometers |
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REAL rad_chaud |
real fice ! fraction of ice in cloud |
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REAL rad_chaud ! effective radius of liquid cloud droplets, in micrometers |
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REAL, PARAMETER:: coef_chau = 0.13 |
REAL, PARAMETER:: coef_chau = 0.13 |
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REAL, PARAMETER:: seuil_neb = 0.001, t_glace = 273. - 15. |
REAL, PARAMETER:: seuil_neb = 0.001, t_glace = 258. |
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real rel, tc, rei, zfiwp(klon) |
real tc, rei, zfiwp |
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real k_ice |
real k_ice |
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real, parameter:: k_ice0 = 0.005 ! units=m2/g |
real, parameter:: k_ice0 = 0.005 ! units=m2 / g |
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real, parameter:: DF = 1.66 ! diffusivity factor |
real, parameter:: DF = 1.66 ! diffusivity factor |
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!----------------------------------------------------------------- |
!----------------------------------------------------------------- |
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! Calculer l'épaisseur optique et l'émissivité des nuages |
! Calculer l'\'epaisseur optique et l'\'emissivit\'e des nuages |
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loop_horizontal: DO i = 1, klon |
loop_horizontal: DO i = 1, klon |
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flwp(i) = 0. |
flwp(i) = 0. |
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! liquid/ice cloud water paths: |
! liquid/ice cloud water paths: |
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! Linear transition: |
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fice = 1. - (t(i, k) - t_glace) / (273.13 - t_glace) |
fice = 1. - (t(i, k) - t_glace) / (273.13 - t_glace) |
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fice = MIN(MAX(fice, 0.), 1.) |
fice = MIN(MAX(fice, 0.), 1.) |
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zflwp(i) = 1000. * (1. - fice) * qlwp(i, k) / clc(i, k) & |
zflwp = 1000. * (1. - fice) * cldliq(i, k) / clc(i, k) & |
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* (paprs(i, k) - paprs(i, k + 1)) / RG |
* (paprs(i, k) - paprs(i, k + 1)) / RG |
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zfiwp(i) = 1000. * fice * qlwp(i, k) / clc(i, k) & |
zfiwp = 1000. * fice * cldliq(i, k) / clc(i, k) & |
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* (paprs(i, k) - paprs(i, k + 1)) / RG |
* (paprs(i, k) - paprs(i, k + 1)) / RG |
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flwp(i) = flwp(i) & |
flwp(i) = flwp(i) + (1. - fice) * cldliq(i, k) & |
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+ (1. - fice) * qlwp(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
* (paprs(i, k) - paprs(i, k + 1)) / RG |
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fiwp(i) = fiwp(i) & |
fiwp(i) = fiwp(i) & |
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+ fice * qlwp(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
+ fice * cldliq(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
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! Total Liquid/Ice water content |
! Total Liquid/Ice water content |
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flwc(i, k) = (1.-fice) * qlwp(i, k) |
flwc(i, k) = (1.-fice) * cldliq(i, k) |
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fiwc(i, k) = fice * qlwp(i, k) |
fiwc(i, k) = fice * cldliq(i, k) |
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! In-Cloud Liquid/Ice water content |
! In-Cloud Liquid/Ice water content |
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! effective cloud droplet radius (microns): |
! effective cloud droplet radius (microns): |
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fl(i, k) = clc(i, k) * (1.-fice) |
fl(i, k) = clc(i, k) * (1.-fice) |
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re(i, k) = rad_chaud * fl(i, k) |
re(i, k) = rad_chaud * fl(i, k) |
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rel = rad_chaud |
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! for ice clouds: as a function of the ambiant temperature |
! for ice clouds: as a function of the ambiant temperature |
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! (formula used by Iacobellis and Somerville (2000), with an |
! (formula used by Iacobellis and Somerville (2000), with an |
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! asymptotical value of 3.5 microns at T<-81.4 C added to be |
! asymptotical value of 3.5 microns at T<-81.4 C added to be |
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tc = t(i, k)-273.15 |
tc = t(i, k)-273.15 |
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rei = merge(3.5, 0.71 * tc + 61.29, tc <= -81.4) |
rei = merge(3.5, 0.71 * tc + 61.29, tc <= -81.4) |
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! cloud optical thickness: |
! Cloud optical thickness. For liquid clouds, traditional |
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! formula (e. g. Liou 2002 k0795 § 8.4.5.2). For ice clouds, |
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! (for liquid clouds, traditional formula, |
! Ebert and Curry (1992). |
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! for ice clouds, Ebert & Curry (1992)) |
if (zfiwp == 0. .or. rei <= 0.) rei = 1. |
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cldtau(i, k) = 3. / 2. * zflwp / rad_chaud & |
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if (zflwp(i) == 0.) rel = 1. |
+ zfiwp * (3.448e-03 + 2.431 / rei) |
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if (zfiwp(i) == 0. .or. rei <= 0.) rei = 1. |
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cltau(i, k) = 3./2. * (zflwp(i)/rel) & |
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+ zfiwp(i) * (3.448e-03 + 2.431/rei) |
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! cloud infrared emissivity: |
! cloud infrared emissivity: |
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! Ebert and Curry (1992) formula as used by Kiehl & Zender (1995): |
! Ebert and Curry (1992) formula as used by Kiehl & Zender (1995): |
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k_ice = k_ice0 + 1. / rei |
k_ice = k_ice0 + 1. / rei |
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clemi(i, k) = 1. - EXP(- coef_chau * zflwp(i) - DF * k_ice * zfiwp(i)) |
clemi(i, k) = 1. - EXP(- coef_chau * zflwp - DF * k_ice * zfiwp) |
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if (clc(i, k) <= seuil_neb) then |
if (clc(i, k) <= seuil_neb) then |
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clc(i, k) = 0. |
clc(i, k) = 0. |
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cltau(i, k) = 0. |
cldtau(i, k) = 0. |
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clemi(i, k) = 0. |
clemi(i, k) = 0. |
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end if |
end if |
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ENDDO loop_vertical |
ENDDO loop_vertical |
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DO k = klev, 1, -1 |
DO k = klev, 1, -1 |
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DO i = 1, klon |
DO i = 1, klon |
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ctlwp(i) = ctlwp(i) & |
ctlwp(i) = ctlwp(i) & |
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+ qlwp(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
+ cldliq(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
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cldt(i) = cldt(i) * (1.-clc(i, k)) |
cldt(i) = cldt(i) * (1.-clc(i, k)) |
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if (play(i, k) <= cetahb * paprs(i, 1)) & |
if (play(i, k) <= cetahb * paprs(i, 1)) & |
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cldh(i) = cldh(i) * (1. - clc(i, k)) |
cldh(i) = cldh(i) * (1. - clc(i, k)) |